Independently-fired superheater.



- J. E. BELL. mnnrnmmn'ru mm) sumznnm'rnn. v union-ml rum) m. as, 1001; 973,743. Patented 0011.25, 1910.

7 SHEETS-SHEET l.

J. E, BELL. IHDE PEHDBHTLY FIRED SUPEBHEATEB.

LPPLIOATIOI TILED IE3. 2B, 1801.

Patented Oct. 25, 1910.

7 SHEETS-SHEET 4.

WITH ISII! J. E. BELL. I INDBPENDENTLY FIRED SUPEEHEATER.

APPLICATION FILED FEB. 26,;1907.

Paten'ted Oct. 25, 1910.

7 SHEETS-SHEET 7.

' UNITED STATES PATENT OFFICE.

JOHN E. 3m, NEW YORK, N. 'Y., ASSIGNOB TO THE BABCOCK & WILCOX COMPANY, 01' NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

INDEPENDENTLY-I'IBED BUPEBHEATEB.

Specification of mad man.

Patented Oct. 25, 1910.

To all whom'it may concern:

Be it known that I, JOHN E. BELL, of New York city, in the county and State of New York, have invented a new and useful Inde endently-Fired Superheater, of which the ollowi is a full, clear, and exact description, re erence being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a vertical cross-section, and

Fig. 2 is a sectional side elevation; and Figs.

3 and 4, 5 and 6, 7 and 8, 9 and 10, 11 and 12, 13 and 14, are respectively views similar toFigs. 1 and 2, showing a. modified form.

M invention relates to the class of indepen ently fired .superheaters, and is desi ed to provide an improved superheater 0 such t .pe wherein the superhe'ater drums or cham rs extend longitudinally of the setting, while at the same time water-heating surface is inter osed between the superheating tubes and t a furnace. In the preferred form, this water-heating surface occupies the first of the serial passes for the gases, thesuperheating tubes being in the rear of this pass.

be embodied in two d ;he invention ma h i erentty ;int eonety etesuperheating cha lir is in the rear of the water drum or drums; while in the other type the superheater chamber or chambers extend alongside the water drum or drums for at least a art of their length.

The first ty is shown In Figs. 1 to 8, inclusive. In igs. 1 and 2, 2 represents an u per and longer drum, and 3 a lower and slibrter drum; both drums extending longitudinall of the setting. The upper drum is provide with a partition 4 havin a hole or holes above the water level to al 0w passage of steam from the'steam and water chamber into the su erhea-ter chamber, between partition' 4 and a complete diaphragm or partition 5, which forms a steam chamber between it and the'head of the drum. The upper water chamber is connected by water tubes 6 with awater chamber formed in the lower drum .by the partition 7, the remainder of thisdrum being a steam chamher. The steam chambers of the up r drum are connected with the steam cham r ofdthe lower drum by an erheater tubes8 gases in up and down passes on their way to the chimney flue -13 is the furnace range 10 and 11 are be es to direct the having therear ports 14 on the sides of the baflle or shield 15 for the lower water chamber, this extending rearwardly from the protecting arch 16. 17 is a steam ipe arranged to lead steam from a boiler into the central chamber of'the upper drum, and 18 In Figs. 5 and 6, I show a v form similar to that of Figs. 1 and 2, except that three upper drums 3" are employed, connected by the water and su erheatlng tubes to the lower drum 3". n these figures similar numerals are employed with the letter I) applied.

In Figs. 7 and 8, I showa form similar to that-of Figs. 1 and 2, except that two lower drums 3 are employed, connected by water tubes and superheating tubes to a single upper drum 2. In'th1s case two of the protecting baffles 15 are employed. In this form similar numerals are employed with the letter 0 applied.

The second type is shown in diflerent forms in Figs. 9 to 14, inclusive. In Figs.

9 and 10, 19 is an upper steam and water drum, connected by water tubes 20 to a mud drum 21 located diagonally with reference to the drum 19. These drums extend longitudinally and preferably from the front to the rear wall 0 the setting; and within this settin are also provided the diagonally arsuperheater drums 22 and 23 connected by the superheater tubes 24. These superheater tubes' preferably extend through and between the water tubes in the second and third passes of the gases between the baflles 25 and 26; and the drums 22 and 23 extend only a part of the len h of theesegi;

ting of t as shown in 10. T e steam s he drum 19 is connected by tubes with one chamber of-the drum 22, which is.

separated from the other chamber by apartition 28. Into this same chamber steam is led from aboiler throu h the supply pi e 29. The steam flows down through t e superheating tubes in the third pass to the lower drum 23, and thence up to the other steam chamber of drum 22 to the outlet 30.

In Figs. 11 and 12, I show a form silihlar to that of Figs. 9 and 10, except that a more symmetrical arrangement of drums is afforded by providing the boiler with two mud drums 21 between which is arranged the lower. steam drum 23 connected by the two banks of superheater tubes 24" to the upper steam drums 22. The steam tubes extend throu h the two banks 20 in the second and t ird passes thereof. In this case the steam is led from drum 19 through tubes 27 to one of the drums 22', into which enters the supply ipe 29 from a boiler. The steam may ow down through one set of tubes, 24' to the drum 23' and thence up to.

the other drum 22" provided with the outlet 30; or each bank may have a double pass as provided in the form of Figs..9 and 10.

In Figs. 13 and 14 there are two upper drums 19 and two mud drums 21 The superheater is. also provided with two up er drums 22" and two lower drums 23". he outer upper drum 22" receives the steam from the drums 19", this steam fiowing through the four banks of tubes 24 to the lower opposite drum 23"; or each bank may have an up and down pass as above described.

The advantages ofmy invention result from the combining of the superheating tubes with water heating tubes between them in the furnace, while usinglongitudinal drums. A simple and 'efiicient form of independently fired superheater is thus obtained, using longitudinal drums with superheater chambers either be 0nd or alo side them. The superheater tu es are not lie le to burn out, owing to the water heating surface between them and the source of heat. This water heatin surface also adds to the boiler capacityof' L-An independently fired superheater e'plant. Many changes may be made in the form and arrangement-of the superheater, the fur- "my n having a longitudinal steam and .water drum or receptacle, with water tubes extendmg downwardlytherefrom and forming the first pass for the ases, means for giving the gases back and orth passes longitudinally of the said drum, and a su erheater having tubes forming the succeedlng heating surface and constituting the major portion of the entire heating surface, sald superheater having an inlet arranged to supply steam thereto from a separate boiler, substantially as described.

2 An independently fired superheater having upper and lower longitudinal drums or receptacles baffles arranged to cause back and forth passes to the gases longitudinally of the drums, water heating surface forming the major part of the heatlng surface in the first pass, the superheating tubes being located in the succeeding pass or asses, and constituting themajor part of t e heating surface, the su erheater having an inlet arranged to supp y steam thereto from a separate boiler and being arranged to receive water and itself not as a steam generator, substantially as described.

3. An independently fired superheater having lon itudinal upperand lower drums connected y water tubes and su erheating tubes, the water tubes forming su stantially the entire first pass for the gases, and superheating tubes in the successlve passes consti-. tuting the ma'or portion of the heating surface, and ba es arranged to give the gases back and forth passes to the gases longitudinally of the drums, the superheater having an inlet from the steam space of its upper water chamber, and also an inlet to supply steam thereto from a separate boiler, substantially as described.

Intestimony whereof, I have hereunto se JOHN E. BELL. Witnesses:

G. K. WAN-NEMAOBER,

Cine.- B. KNUDSON. 

